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Startups14,448Programs29

14,448 startups · 29 programs

Bloom

Active · Build and share mobile apps in seconds

WebsiteYC profile

Why it ranks

How the rank works
7signal of 100 · rising 4
  • went through YCProgram · this site+4
  • team of 2Team size · YC's directory+2.5

A sum of public facts, not a judgement and not investment advice.

Competitors

AIRosebud AIShared: vibe code, letsYC S19San FranciscoStartup →AIVibeShared: vibe codeYC S24San FranciscoStartup →AIElseShared: vibe codespeedrun SR003OaklandStartup →AIRorkShared: mobile apps, share, phonespeedrun SR005San FranciscoStartup →AIAucertShared: mobile apps, functional, testYC F26San FranciscoStartup →
Companies closest to Bloom
Company
Rosebud AIShared: vibe code, letsYC S19 +1ActiveAI, Devtools
VibeShared: vibe codeYC S24ActiveAI, Devtools
ElseShared: vibe codespeedrun SR003Not statedAI, Devtools
RorkShared: mobile apps, share, phonespeedrun SR005Not statedAI, Devtools
AucertShared: mobile apps, functional, testYC F26ActiveAI, Devtools

Adjacent

OthervibecodeShared: mobile appsNeoStartup →OtherBridgefyShared: mobile appsAlchemist Class 22MiamiStartup →AINudgeShared: code tool, mobileAntler 2024IndiaStartup →OtherAppXShared: personal apps, mobile appsYC S21New DelhiStartup →AIAppstackShared: mobile appsEF 2025ParisStartup →
Companies next to Bloom
Company
vibecodeShared: mobile appsNeo Not statedOther
BridgefyShared: mobile appsAlchemist Class 22Not statedOther
NudgeShared: code tool, mobileAntler 2024Not statedAI
AppXShared: personal apps, mobile appsYC S21ActiveOther
AppstackShared: mobile appsEF 2025Not statedAI

Also from X25 in Developer tools

All of X25
Developer toolsAravoltaSoftware to monitor, control, and optimize data centers.YC X25IndianapolisStartup →Developer toolsBetter AuthThe authentication framework for TypeScriptYC X25San FranciscoStartup →Developer toolsPrismAbundant Intelligence for EveryoneYC X25San FranciscoStartup →Developer toolsRefreshTraining gyms for computer use and software engineering workYC X25San FranciscoStartup →
Company
AravoltaSoftware to monitor, control, and optimize data centers.team of 4hiringActiveDevtools
Better AuthThe authentication framework for TypeScriptteam of 4ActiveDevtools
PrismAbundant Intelligence for Everyoneteam of 2ActiveDevtools
RefreshTraining gyms for computer use and software engineering workteam of 8ActiveDevtools

Founders

  • David Oort AlonsoFounder/CEO
  • Sirian MaathuisFounder

About Bloom

Bloom lets you vibe code cross-platform apps and test them on your phone natively in seconds. Unlike other vibe code tools, Bloom deploys a backend for you, so you can build functional MVPs and personal apps, not just toys. https://youtu.be/oeJCk_nwDZg

YC batch
X25 · Spring 2025
Status, per YC
Active
Category
Developer tools
Team size
2
Founded
2025
Checked
10h ago

Changes seen

HiringNov 9, 2026

Stopped hiring.

Source ↗

Bloom in X25: 144 companies, 90% AI

GitHub LinkedIn

Bloom: questions

Which YC batch was Bloom in?

Bloom was in Y Combinator's Spring 2025 batch (X25).

Is Bloom still active?

Y Combinator lists Bloom as active.

Who founded Bloom?

Bloom's founders, as listed on its YC page: David Oort Alonso (Founder/CEO), Sirian Maathuis (Founder).